Blocking inbound call in CM with MGCP Voice gateways

I'm sure someone has posted on this: We have MGCP voicegateways and CM 4.02aSR2b. How can I setup CM to block a specific inbound call? If the gateways were H323 then no problem, but with MGCP we are stumped. Any suggestions? Thx!

I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...
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